Rob Van Dam would be a solid hand to have around, I'd be all for a return. That being said, he wouldn't be featured as a top guy, if anything, put him in that Jericho-esque upper midcard niche and have him do what he's best at -- entertaining the fans and wrestling good matches.
I agree- To me, that's the best role for him at this point. I don't see how people can see RVD returning not being a successful one if he's not World Champion. He won the World Title in TNA sure. But it's been over a year since he won said title, and he's been as far away from it as can be for some time now.
Van Dam, when motivated. can still wrestle a solid match. Look back to his match with Jerry Lynn at BFG, for example. RVD looked very motivated in what was possibly his last match against his greatest rival. RVD hasn't been in many cohesive storylines as of late, so it would be hard to be motivated at times, Id imagine. Id welcome him back if he were to return to WWE, because he's a guy they'd have a clear direction for, if how they used him before is any indication. I can't imagine him as a main eventer, but other then for one PPV, when was he ever? He'd be a solid hand in the main event scene, one they'd be able to use to legitimize a mid-card title, and to get over younger heel wrestlers as well.
If, as others have suggested, Van Dam is able to legally use marijuana, then
I don't see the problem here. It was never an issue before his arrest in 2006, and he was only suspended due to the arrest with a controlled substance, not for recreational marijuana use. So if he's good there and he's motivated, I don't see why bringing Van Dam in would create a problem. He's not going to hold younger wrestlers down, as he'ld be good for mid-card feuds. So if he wanted to return, I'd be all for having him. I always enjoyed Van Dam and found him to be an excellent talent, and still do to this day. Has he lost a step? Sure. But if he could come back on his terms, he'ld be very good for the company.